Zero hysteresis involute less tooth difference reducer

Abstract

The invention relates to the technical field of involute small tooth differences, in particular to a zero-return-difference involute small-tooth-difference reduction box which comprises a base, planet wheels A and B, an inner gear ring, an input shaft, an end cover and a w-shaped output mechanism. The zero-return-difference involute small-tooth-difference reduction box is characterized in that the inner gear ring is connected to an inner hole of the base, and wheel teeth of the planet wheel B are abut against the anticlockwise side of inner teeth in an upper half area of the inner gear ring; wheel teeth of the planet wheel A abut against the clockwise side of the inner teeth in the lower half area of the inner gear ring, and the phase difference between the two planet wheels is smaller than 180 degrees; a check ring is arranged at the extending end of an input shaft, two eccentric bushings are arranged between the check ring and the shoulder of the input shaft, the inner end faces of the two eccentric bushings are provided with trapezoid teeth which are meshed with each other, the second eccentric bushing is connected to the input shaft, the outer end of the second eccentric bushing abuts against the shoulder of the input shaft, the first eccentric bushing is matched with the input shaft in a sliding mode, and a spring is arranged between the outer end of the first eccentric bushing and the elastic check ring. The zero-return-difference involute small-tooth-difference reduction box has the advantages that the manufacturing technique is simple, zero return difference is achieved, the reduction box can be applied to a radar rotation tracking reduction gear and the like, is high in efficiency, can replace three levels of planet gears, is large in transmission ratio, small in size, low in weight, stable in operation, and convenient to assemble and disassemble, and the tooth profile is easy to machine.

Description

【Technical field】 [0001] The present invention relates to the improvement in the technical field of general involute small tooth difference reduction gear, a zero backlash involute small tooth difference reducer, specifically, its low cost can be used as a general involute small tooth difference machine, and Zero hysteresis is mainly used for radar antenna azimuth turntable and so on. 【Background technique】 [0002] "Design and Manufacture of Involute Gear Planetary Transmission" points out on page 188: "The involute small tooth difference transmission has the advantages of compact structure, small size, light weight, large transmission ratio range, high efficiency, convenient processing, and low cost. Features. Therefore, it is widely used in light industry, petrochemical, food, textile, metallurgy, construction, lifting and other equipment. In recent years, it has also been used in military equipment, such as communication equipment, missiles and rocket launchers.” [000...

AI Technical Summary

Problems solved by technology

[0007] Due to the large hysteresis (15-20 arc min), the existing general-purpose reducer with small tooth difference cannot be applied to the radar antenna azimuth turntable drive device and the large-scale solar photovoltaic power generation tracking drive device

[0008] "A Brand New Radar Antenna Azimuth Turntable" disclosed in the 2004.02 issue of "Radar and Confrontation" is an azimuth transmission device directly composed of an "external three-crank planetary reducer with small tooth difference". Accuracy to achieve small hysteresis, thus greatly increasing the manufacturing cost

[0009] Most of the solar photovoltaic power generation tracking transmission devices at home and abroad use "multi-stage planetary reduction components + worm gear + worm gear + worm gear anti-backlash mechanism". Wear and tear will occur, and the hysteresis will increase, which will greatly affect the positioning accuracy

[0010] The invention application "A Heliostat Azimuth Transmission Device" (201310115194.5) published by the China Patent Office of Chongqing Gearbox Company adopts "multi-stage planetary reduction components + worm gear pair + planetary output components + planetary anti-backlash mechanism". The problem is: the structure is complicated; due to the planetary anti-backlash mechanism, half of the tooth length of the inner ring gear in the planetary output part is meshed with the planetary gear, and the other half is meshed with the anti-backlash planetary wheel, so the load capacity is reduced by half

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